Letter from Howard Walter Florey to P B Medawar, Zoology Department, Gower Street, London Is enclosing Gowans' certificate of candidature for Fellowship of Royal Society with four signatures on it - Medawar will be the fifth - perhaps one of Medawar's colleagues would sign - has written to Oakley to ask if he will sign - has omitted, at Fildes' suggestion, the first sentence. 10 November 1959